<?php

/*
 * Copyright 2008 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#namespace tehframework\iocc;

#use \OutOfBoundsException;

abstract class Container
{
	/**
	 * @var array<string,mixed>
	 */
	protected $parameters = array();
	
	/**
	 * @param  string $type
	 * @param  string? $name
	 * @return bool
	 */
	abstract public function isResolvable($type, $name = null);
	
	/**
	 * @param  string $type
	 * @param  string? $name
	 * @param  array<int,mixed>? $args
	 * @return object
	 * @throws ObjectBuildingException
	 */
	abstract public function resolve($type, $name = null, array $args = null);
	
	/**
	 * @param  string $name
	 * @return bool
	 */
	public function hasParameter($name)
	{
		return array_key_exists($name, $this->parameters);
	}
	
	/**
	 * @param  string $name
	 * @param  mixed $default
	 * @return mixed
	 * @throws OutOfBoundsException
	 */
	public function getParameter($name, $default = null)
	{
		$hasParameter = $this->hasParameter($name);
		
		if (!$hasParameter && (func_num_args() === 1))
		{
			throw new OutOfBoundsException(sprintf(
				'[%s] parameter does not exist.', $name
			));
		}
		
		return $hasParameter ? $this->parameters[$name] : $default;
	}
}